Does eating slate pencils have a bad effect on one's health? - Quora

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Does eating slate pencils have a bad effect on one's health? - Quora

7 Ridiculous Slate Pencil Eating Side Effects You Must Know

I have a bad habit of eating slate pencil (stone pencil) I use to

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Benefits Of Eating Slate Pencils

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Slate Pencil Eating Benefits, Side Effects & More

How are slate pencils made? - Quora